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Signal
Problem
7 blinks
The burner goes into
lockout immediately
following the
appearance of the
flame
Burner goes into
lockout during oper-
ation
10 blinks
The burner does not
switch on, and the
lockout appears
The burner goes into
lockout
No blink
The burner does not
start
The burner contin-
ues to repeat the
start-up cycle, with-
out lockout
Ignition with pulsa-
tions
N.B.: If problems still occur after all of the above checks have been made, check the electrical connec-
tions on the plug and sockets, the damper and burner motor, gas control wiring ignition transformer
and external interlocks, if the burner still fails to function, replace the control box.
Possible cause
24 - The operation solenoid lets little gas .
through
25 - Ionisation probe incorrectly adjusted . Adjust
26 - Insufficient ionisation (less than 5 A) . Check probe position
27 - Earth probe . . . . . . . . . . . . . . . . . . . . Withdraw or replace cable
28 - Burner poorly grounded. . . . . . . . . . . Check grounding
29 - Phase and neutral connections
inverted
30 - Defective flame detection circuit . . . . Replace the control box
31 - Probe or ionisation cable grounded. . Replace worn parts
32 - Incorrect electrical wiring . . . . . . . . . . Check
33 - Defective control box . . . . . . . . . . . . . Replace
34 - Presence of electromagnetic . . . . . .
disturbances in the thermostat lines
35 - No electrical power supply . . . . . . . . Close all switches - Check con-
36 - A limiter or safety control device is
open
37 - Line fuse blocked . . . . . . . . . . . . . . . Replace
38 - Defective control box . . . . . . . . . . . . . Replace
39 - No gas supply . . . . . . . . . . . . . . . . . . Open the manual valves
40 - Mains gas pressure insufficient . . . . . Contact your GAS COMPANY
41 - Minimum gas pressure switch fails to
close
42 - The gas pressure in the gas mains
lies very close to the value to which
the minimum gas pressure switch has
been set. The sudden drop in pres-
sure after valve opening causes tem-
porary opening of the pressure switch
itself, the valve immediately closes
and the burner comes to a halt. Pres-
sure increases again, the pressure
switch closes again and the ignition
cycle is repeated. And so on
43 - Poorly adjusted head. . . . . . . . . . . . . Adjust
44 - Ignition electrode incorrectly adjusted Adjust
45 - Incorrectly adjusted fan air damper:
too much air
46 - Output during ignition phase is too
high
13
Recommended remedy
Increase
Invert them
Filter or eliminate
nections
Adjust or replace
between contactor and train
Adjust or replace
Reduce the minimum gas pres-
sure switch intervention pres-
sure. Replace the gas filter
cartridge.
Adjust
Reduce
20025473
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